Relationships between height (H, cm) and relative daily photon flux (logDPFrel) for the three stages of architectural development (ASD 1, white dots, ASD 2 grey diamonds and ASD 3 black dots) and for two species (T. melinonii and D. guianensis). Regression equations, level of significance (P) and coefficient of determination (r²) are indicated for statistically significant linear regressions. Significance levels: ns, P > 0.05;*, P < 0.05; **, P < 0.01 and ***, P < 0.001.